Cobalt neo therm issues

[Marc2952]

I have 3 neo therm heaters in my 75 gallon tank for redundancy, 1 200w and 2 50w, i noticed that even with all 3 set to 78 my tank temperature has been slowly dropping to 75 throught the course of a month. Today i woke up a d noticed my corals arent too happy and to find out its down to 73.5 now. I know before this heaters had issues but i thought they fixed that. Is there any way to reset them? Or just set the temperature higher to 80?

 

[Scurvy]

If it were me and I believed the heaters weren’t operating correctly I would junk them and get new before anything worse happened. Perhaps use them for water changes but I wouldnt trust them in the tank any longer.

I had a Neotherm cook a Biocube and personally do not trust them.

 

[Retro Reefer]

I would pull them and check each one in a bucket of water with a accurate thermometer to make sure they are all calibrated.. honestly those things make me nervous especially the higher wattage ones, I have a small one in a Biocube and it works great but I’m constantly worrying about it.

 

[Marc2952]

If it were me and I believed the heaters weren’t operating correctly I would junk them and get new before anything worse happened. Perhaps use them for water changes but I wouldnt trust them in the tank any longer.

I had a Neotherm cook a Biocube and personally do not trust them.

Alrighty will pull them out today, which heater do you trust? And how many watts would you get for a 95 gallon total volume?

 

[Marc2952]

I would pull them and check each one in a bucket of water with a accurate thermometer to make sure they are all calibrated.. honestly those things make me nervous especially the higher wattage ones, I have a small one in a Biocube and it works great but I’m constantly worrying about it.

Ill pull them out and test to see

 

[Scurvy]

I would look for two 150w heaters. Ive had great luck myself with the 300w Finnex Titanium's. I would use those again or try the BRS heaters if you can find them in stock. Always a good idea to use a controller like Inkbird behind them as well.

 

[Scorpius]

They have to be mounted vertically or they wont work correctly.

 

[NASOTANG87]

I have 3 neo therm heaters in my 75 gallon tank for redundancy, 1 200w and 2 50w, i noticed that even with all 3 set to 78 my tank temperature has been slowly dropping to 75 throught the course of a month. Today i woke up a d noticed my corals arent too happy and to find out its down to 73.5 now. I know before this heaters had issues but i thought they fixed that. Is there any way to reset them? Or just set the temperature higher to 80?

If you have them hooked up to a timer or switch that turns it off/on constantly it can cause them to go bad.

 

[Marc2952]

If you have them hooked up to a timer or switch that turns it off/on constantly it can cause them to go bad.

No switch or anything just plugged in

 

[vetteguy53081]

Been many issues with these heaters especially what you are experiencing along with swelling of the heater body.

 

[SashimiTurtle]

I had a 200W go out on me a month ago. Only worked flawlessly for 3 years. The thermostat wouldnt hold temp. I could unplug it and it would work for a few days then lose temp again. I replaced it with a new 300W Neotherm, no issues with it, holds temp at 77.9°F when set to 78... close enough for me.

 

[Marc2952]

They have to be mounted vertically or they wont work correctly.

Yea they are vertical, i mounted one on the DT and two on the sump

 

[Marc2952]

I had a 200W go out on me a month ago. Only worked flawlessly for 3 years. The thermostat wouldnt hold temp. I could unplug it and it would work for a few days then lose temp again. I replaced it with a new 300W Neotherm, no issues with it, holds temp at 77.9°F when set to 78... close enough for me.

Strange mines has only been running for 6 months, one of them for only 2 months since i got it thinking that maybe the 200W and 50W couldnt handle it but i guess i was wrong.

 

[SashimiTurtle]

The thermostats seem to fail cold on these often. I guess I've been lucky. They do have a built in over temp protection, but I dont know when that actually kicks in.

Redundantcy is always a good idea with heaters, and a relay of some type to kill them if they over heat.

 

[good.reef]

I have 2x Neotherms on my 40 gallon and I really like these heaters. I keep my tank between 73-75 degrees constantly and all of my corals are thriving.

 

[Marc2952]

The thermostats seem to fail cold on these often. I guess I've been lucky. They do have a built in over temp protection, but I dont know when that actually kicks in.

Redundantcy is always a good idea with heaters, and a relay of some type to kill them if they over heat.

So i spoke to cobalt amd they said that i can reset the heater by disconnecting it for 30 mins, lets see if this works. Im changing it regardless since that gets me anxious.

 

[Marc2952]

Yup just tried the reset method and nothing, gonna wait on the brs heaters to be for sale.

 

[good.reef]

Yup just tried the reset method and nothing, gonna wait on the brs heaters to be for sale.

Just a troubleshooting question... When you do a water change do you cut the power to the heaters to make sure they aren't running outside of being fully submerged?

 

[Gharris527]

I have 3 neo therm heaters in my 75 gallon tank for redundancy, 1 200w and 2 50w, i noticed that even with all 3 set to 78 my tank temperature has been slowly dropping to 75 throught the course of a month. Today i woke up a d noticed my corals arent too happy and to find out its down to 73.5 now. I know before this heaters had issues but i thought they fixed that. Is there any way to reset them? Or just set the temperature higher to 80?

Sounds like ur heaters are not calibrated right from the factory I always had great success with Eheim heaters I’ve heard those heaters are not that great

 

[Gharris527]

Just a troubleshooting question... When you do a water change do you cut the power to the heaters to make sure they aren't running outside of being fully submerged?

Yes